docs: def bulk_create(self, objs, batch_size=None):
          """
          Inserts each of the instances into the database. This does *not* call
          save() on each of the instances, does not send any pre/post save
          signals, and does not set the primary key attribute if it is an
          autoincrement field.
          """
          self._insert(objs, batch_size=batch_size, return_id=False, force_insert=True)
          self.refresh()